Fix false positive for unit_arg lint
Fixes#6447
To avoid false positives don't complain about unit args when they come from a path expression, e.g. a local variable.
**Note:** This is my first contribution to Clippy, so I might have messed up somewhere. Any feedback is welcome and I'm happy to work out any kinks.
---
changelog: Do not lint unit arguments when they come from a path expression.
or_fun_call: fix suggestion for `or_insert(vec![])`
fixes#6748
changelog: or_fun_call: fix suggestion for `or_insert(vec![])` on `std::collections::hash_map::Entry` or `std::collections::btree_map::Entry`
Applies for `std::collections::hash_map::Entry` and `std::collections::btree_map::Entry`
Example:
Previously, for the following code:
`let _ = hash_map.entry("test".to_owned()).or_insert(vec![]);`
clippy would suggest to use:
`or_insert_with(vec![])`, which causes a compiler error (E0277).
Now clippy suggests:
`or_insert_with(Vec::new)`
move upper_case_acronyms back to style, but make the default behaviour less aggressive by default (can be unleashed via config option)
Previous discussion in the bi-weekly clippy meeting for reference: https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Meeting.202021-02-23/near/227458019
Move the `upper_case_acronyms` lint back to the style group.
Only warn on fully-capitalized names by default.
Add add a clippy-config option `upper-case-acronyms-aggressive: true/false` to enabled more aggressive linting on
all substrings that could be capitalized acronyms.
---
changelog: reenable upper_case_acronyms by default but make the more aggressive linting opt-in via config option
Moves the lint back from pedantic to style group.
The lint default now only warns on names that are completely capitalized, like "WORD"
and only if the name is longer than 2 chars (so that names where each of the letter represents a word are still distinguishable).
For example: FP (false positive) would still be "valid" and not warned about (but EOF would warn).
A "upper_case_acronyms_aggressive: true/false" config option was added that restores the original lint behaviour to warn
on any kind of camel case name that had more than one capital letter following another capital letter.
The lint does point out inconsistency with the Rust naming convention,
but the fact that rustc does not warn about the inconsistency by default
means that clippy probably should not warn by default either.
changelog: move upper_case_acronyms lint from style to pedantic group.
Inconsistent struct constructor
fixes: #6352
r? `@matthiaskrgr`
I added the lint that checks for the struct constructors where the order of the field init shorthands is inconsistent with that in the struct definition.
changelog: Add style lint: `inconsistent_struct_constructor`
Fix FP in inherent_to_string when the function has generic parameters
Minimal example of the false positive:
````
struct G;
impl G {
fn to_string<const _N: usize>(&self) -> String {
"G.to_string()".to_string()
}
}
fn main() {
let g = G;
g.to_string::<1>();
}
````
Clippy emits an `inherent_to_string` warning, and suggests that we implement `Display` for `G` instead. However, this is not possible, since the generic parameter _N only exists in this function, not in `G` itself. This particular example uses const generics, which is where the issue is most likely to come up, but this PR skips the lint if the `to_string` function has any kind of generic parameters.
changelog: Fix FP in `inherent_to_string`
Change unnecessary_wraps to pedantic
changelog: Change unnecessary_wraps to pedantic
There seems to be enough evidence that this lint is not wanted as warn-by-default. Attempted before at #6380. False positives at #6721 and #6427. Actually requested to change the category at #6726.
Closes#6726
Teach SpanlessEq binding IDs
changelog: Fix collapsible_match false positive
Fixes#6740
This PR changes the way `SpanlessEq` determines whether two local variables are the same. Instead of checking that the names match, it checks that the `HirId`s match. If local bindings are declared within the expressions that are being compared, `SpanlessEq` will remember bindings that correspond to each other in a `FxHashMap<HirId, HirId>`. This makes `SpanlessEq` more flexible while also fixing false positives.
Example: `{ let x = 1; x + 2 }` is equal to `{ let y = 1; y + 2 }`.
CC `@xFrednet` I think this will resolve some concerns in #6463
Add the from_str_radix_10 lint
changelog: added the new `from_str_radix_10` which sometimes replaces calls to `primitive::from_str_radix` to `str::parse`
This is ready to be merged, although maybe the category should be `pedantic` instead of `style`? I'm not sure where it fits better.
Closes#6713.
ast: Keep expansion status for out-of-line module items
I.e. whether a module `mod foo;` is already loaded from a file or not.
This is a pre-requisite to correctly treating inner attributes on such modules (https://github.com/rust-lang/rust/issues/81661).
With this change AST structures for `mod` items diverge even more for AST structure for the crate root, which previously used `ast::Mod`.
Therefore this PR removes `ast::Mod` from `ast::Crate` in the first commit, these two things are sufficiently different from each other, at least at syntactic level.
Customization points for visiting a "`mod` item or crate root" were also removed from AST visitors (`fn visit_mod`).
`ast::Mod` itself was refactored away in the second commit in favor of `ItemKind::Mod(Unsafe, ModKind)`.
Fix for issue 6640
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: unnecessary_wraps will now suggest to remove unnecessary wrapped return unit type, like Option<()>
fixes#6640
Replace if-let and while-let with `if let` and `while let`
This pull request replaces if-let and while-let with `if let` and `while let`.
closes https://github.com/rust-lang/rust/issues/82205
New lint: default_numeric_fallback
fixes#6064
r? `@flip1995`
As we discussed in [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20.236064/near/224647188) and [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20clippy.236064/near/224746333), I start implementing this lint from the strictest version.
In this PR, I'll allow the below two cases to pass the lint to reduce FPs.
1. Appearances of unsuffixed numeric literals in `Local` if `Local` has a type annotation, for example:
```rust
// Good.
let x: i32 = 1;
// Also good.
let x: (i32, i32) = if cond {
(1, 2)
} else {
(2, 3)
};
```
2. Appearances of unsuffixed numeric literals in args of `Call` or `MethodCall` if corresponding arguments of their signature have concrete types, for example:
```rust
fn foo_mono(x: i32) -> i32 {
x
}
fn foo_poly<T>(t: T) -> t {
t
}
// Good.
let x = foo_mono(13);
// Still bad.
let x: i32 = foo_poly(13);
```
changelog: Added restriction lint: `default_numeric_fallback`
